Generation IV Internal Engine - Looking for a LS3 bare block



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Randy WS6
05-05-2009, 05:29 PM
Where can i find a LS3 bare block for a reasonable price shipped and with the sleeves centered in the bore. new or used ?

Beau@SDPC
05-05-2009, 05:39 PM
how about $1400 plus shipping...dont have any on hand atm but should get some soon...brand new from GM....
venom ws7
05-05-2009, 06:22 PM
Holy Moly great price.

John are you sure about the price???

Beau@SDPC
05-05-2009, 06:29 PM
you better believe it....go put that into our site...itll say the same thing. part number is 12621769

http://www.sdparts.com/product/12621769/BLOCK.aspx

if this were ebay i would put NMIB...er C for crate...lol
Randy WS6
05-05-2009, 10:22 PM
what the difference between your block part#12621769 and the 12584727 07-08 LS3 ?
MDM@SDPC
05-06-2009, 08:21 AM
what the difference between your block part#12621769 and the 12584727 07-08 LS3 ?

Part number change from GMPP. If you order a 12584727 from GM you will get a 12621769. Probably has a pnc for internal reasons at GMPP.
Mean 69
05-11-2009, 12:30 PM
I think I read somewhere that the newest LS3's will use the same block as the LS9 supercharged engine. Apparently there have been several updates to it relative to previous versions to improve bottom end strength. Can you guys confirm this is indeed the case? Is there a part number change as a result of this (i.e. possibly eraly LS3's versus the latest, if there has been a change)?

Thanks, on my short list of items to buy in near future.

One more question, does GM offer a stock, LS3 short block? I already have a top end setup, a factory LS3 bottom would be an economical way for me to move forward more quickly.

Mark
Beau@SDPC
05-11-2009, 01:30 PM
no, gm no longer offers short blocks for the LS. they used to for the ls1 i believe, but have since stopped. just long blocks for all now.
ColeGTO
05-13-2009, 01:52 AM
Where can i find a LS3 bare block for a reasonable price shipped and with the sleeves centered in the bore. new or used ?


Call Tom at Nelson Racing Engines (818)998-5593 he has a few bare blocks and also short blocks.



Cole
Busted Knuckles
05-13-2009, 05:58 AM
What's your build plans? I have a buddy who's abandoning a project, he has a new block and a set of new Manley flat top pistons for a 4.1" stroke 427 along with a pair of bare L-92 heads. I'm sure he'd make you a great deal on part or all of it.
Randy WS6
05-13-2009, 08:09 PM
I found a block, but what would he want for the pistons, I have a 4.100" crank shaft
Busted Knuckles
05-13-2009, 08:20 PM
I'll ask - I'll get the part numbers as well. I think he has a set of Childs-Ackerly rings, too.
njc.corp
05-14-2009, 02:24 AM
Seems i cant find any ls7 blocks-anyone know of anyone

Thanks
Busted Knuckles
05-14-2009, 08:27 AM
Email me at 81vette4speed@suddenlink.net, I know of a new one for sale.
03EBZ06
08-03-2009, 10:40 PM
you better believe it....go put that into our site...itll say the same thing. part number is 12621769

http://www.sdparts.com/product/12621769/BLOCK.aspx

if this were ebay i would put NMIB...er C for crate...lol

Do you know what a 12621766 is? That is what my current block is...going in this week. Its supposed to be a LS3, just curious if anything special about it.

Thanks.
BRD-PREY
08-07-2009, 06:23 PM
Where can i find a LS3 bare block for a reasonable price shipped and with the sleeves centered in the bore. new or used ?


Are the sleeves being centered something thats not common? on new blocks
Ed